package com.csp.mingyue.common.log.aspect;

import cn.hutool.core.lang.Dict;
import cn.hutool.core.map.MapUtil;
import cn.hutool.core.util.ArrayUtil;
import cn.hutool.core.util.ObjectUtil;
import cn.hutool.core.util.StrUtil;
import cn.hutool.json.JSONUtil;
import com.csp.mingyue.common.core.utils.AddressUtils;
import com.csp.mingyue.common.core.utils.JsonUtils;
import com.csp.mingyue.common.core.utils.ServletUtils;
import com.csp.mingyue.common.core.utils.SpringUtils;
import com.csp.mingyue.common.core.vo.R;
import com.csp.mingyue.common.log.annotation.Log;
import com.csp.mingyue.common.log.enums.BusinessStatus;
import com.csp.mingyue.common.log.event.OperateLogEvent;
import com.csp.mingyue.common.satoken.utils.LoginHelper;
import com.csp.mingyue.system.api.vo.LoginUser;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.AfterThrowing;
import org.aspectj.lang.annotation.Aspect;
import org.springframework.boot.autoconfigure.AutoConfiguration;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.validation.BindingResult;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Collection;
import java.util.Map;
import java.util.Objects;
import java.util.StringJoiner;

/**
 * 操作日志记录处理
 *
 * @author Strive
 */
@Slf4j
@Aspect
@RequiredArgsConstructor
@AutoConfiguration
public class LogAspect {

	private final ServiceInstance serviceInstance;

	/**
	 * 排除敏感属性字段
	 */
	public static final String[] EXCLUDE_PROPERTIES = { "password", "oldPassword", "newPassword", "confirmPassword" };

	/**
	 * 处理完请求后执行
	 * @param joinPoint 切点
	 */
	@AfterReturning(pointcut = "@annotation(controllerLog)", returning = "jsonResult")
	public void doAfterReturning(JoinPoint joinPoint, Log controllerLog, Object jsonResult) {
		handleLog(joinPoint, controllerLog, null, jsonResult);
	}

	/**
	 * 拦截异常操作
	 * @param joinPoint 切点
	 * @param e 异常
	 */
	@AfterThrowing(value = "@annotation(controllerLog)", throwing = "e")
	public void doAfterThrowing(JoinPoint joinPoint, Log controllerLog, Exception e) {
		handleLog(joinPoint, controllerLog, e, null);
	}

	protected void handleLog(final JoinPoint joinPoint, Log controllerLog, final Exception e, Object jsonResult) {
		// 日志记录开始时间
		Long startTime = System.currentTimeMillis();

		// ========数据库日志========
		OperateLogEvent operateLog = new OperateLogEvent();

		try {
			// 请求信息
			String ip = ServletUtils.getClientIP();
			operateLog.setReqIp(ip);
			operateLog.setServiceId(serviceInstance.getServiceId());
			operateLog.setReqAddress(AddressUtils.getRealAddressByIP(ip));
			operateLog
					.setReqUrl(StrUtil.sub(Objects.requireNonNull(ServletUtils.getRequest()).getRequestURI(), 0, 255));

			operateLog.setStatus(BusinessStatus.SUCCESS.ordinal());

			// 用户信息
			LoginUser loginUser = LoginHelper.getLoginUser();
			operateLog.setUserId(loginUser.getUserId());
			operateLog.setUserName(loginUser.getUsername());

			if (e != null) {
				operateLog.setStatus(BusinessStatus.FAIL.ordinal());
				operateLog.setException(StrUtil.sub(e.getMessage(), 0, 2000));
			}

			// 设置方法名称
			String className = joinPoint.getTarget().getClass().getName();
			String methodName = joinPoint.getSignature().getName();
			operateLog.setMethod(className + "." + methodName + "()");

			// 设置User-Agent
			operateLog.setUserAgent(ServletUtils.getRequest().getHeader(HttpHeaders.USER_AGENT));
			// 设置请求方式
			operateLog.setReqMethod(ServletUtils.getRequest().getMethod());
			// 处理设置注解上的参数
			getControllerMethodDescription(joinPoint, controllerLog, operateLog, jsonResult);
		}
		catch (Exception exp) {
			// 记录本地异常日志
			log.error("异常信息:{}", exp.getMessage());
		}
		finally {
			Long endTime = System.currentTimeMillis();
			operateLog.setDuration(endTime - startTime);
			// 发布事件保存数据库
			SpringUtils.context().publishEvent(operateLog);
		}
	}

	/**
	 * 获取注解中对方法的描述信息 用于Controller层注解
	 * @param log 日志
	 * @param operateLog 操作日志
	 */
	public void getControllerMethodDescription(JoinPoint joinPoint, Log log, OperateLogEvent operateLog,
			Object jsonResult) throws Exception {
		// 设置标题
		operateLog.setModule(log.module());
		// 设置 action 动作
		operateLog.setBusinessType(log.businessType().ordinal());
		// 设置操作人类别
		operateLog.setUserType(log.operatorUserType().ordinal());
		// 是否需要保存 request，参数和值
		if (log.isSaveRequestData()) {
			// 获取参数的信息，传入到数据库中。
			setRequestValue(joinPoint, operateLog, log.excludeParamNames());
		}
		// 是否需要保存 response，参数和值
		if (log.isSaveResponseData() && ObjectUtil.isNotNull(jsonResult)) {
			R resp = JSONUtil.toBean(JSONUtil.toJsonStr(jsonResult), R.class);
			operateLog.setRespMsg(resp.getMsg());
			operateLog.setRespCode(resp.getCode());
			operateLog.setRespResult(StrUtil.sub(JSONUtil.toJsonStr(jsonResult), 0, 2000));
		}
	}

	/**
	 * 获取请求的参数，放到log中
	 * @param operLog 操作日志
	 * @throws Exception 异常
	 */
	private void setRequestValue(JoinPoint joinPoint, OperateLogEvent operLog, String[] excludeParamNames)
			throws Exception {
		Map<String, String> paramsMap = ServletUtils.getParamMap(ServletUtils.getRequest());
		String requestMethod = operLog.getReqMethod();
		if (MapUtil.isEmpty(paramsMap) && HttpMethod.PUT.name().equals(requestMethod)
				|| HttpMethod.POST.name().equals(requestMethod)) {
			String params = argsArrayToString(joinPoint.getArgs(), excludeParamNames);
			operLog.setReqParams(StrUtil.sub(params, 0, 2000));
		}
		else {
			MapUtil.removeAny(paramsMap, EXCLUDE_PROPERTIES);
			MapUtil.removeAny(paramsMap, excludeParamNames);
			operLog.setReqParams(StrUtil.sub(JSONUtil.toJsonStr(paramsMap), 0, 2000));
		}
	}

	/**
	 * 参数拼装
	 */
	private String argsArrayToString(Object[] paramsArray, String[] excludeParamNames) {
		StringJoiner params = new StringJoiner(" ");
		if (ArrayUtil.isEmpty(paramsArray)) {
			return params.toString();
		}
		for (Object o : paramsArray) {
			if (ObjectUtil.isNotNull(o) && !isFilterObject(o)) {
				String str = JSONUtil.toJsonStr(o);
				Dict dict = JsonUtils.parseMap(str);
				if (MapUtil.isNotEmpty(dict)) {
					MapUtil.removeAny(dict, EXCLUDE_PROPERTIES);
					MapUtil.removeAny(dict, excludeParamNames);
					str = JSONUtil.toJsonStr(dict);
				}
				params.add(str);
			}
		}
		return params.toString();
	}

	/**
	 * 判断是否需要过滤的对象。
	 * @param o 对象信息。
	 * @return 如果是需要过滤的对象，则返回true；否则返回false。
	 */
	@SuppressWarnings("rawtypes")
	public boolean isFilterObject(final Object o) {
		Class<?> clazz = o.getClass();
		if (clazz.isArray()) {
			return clazz.getComponentType().isAssignableFrom(MultipartFile.class);
		}
		else if (Collection.class.isAssignableFrom(clazz)) {
			Collection collection = (Collection) o;
			for (Object value : collection) {
				return value instanceof MultipartFile;
			}
		}
		else if (Map.class.isAssignableFrom(clazz)) {
			Map map = (Map) o;
			for (Object value : map.values()) {
				return value instanceof MultipartFile;
			}
		}
		return o instanceof MultipartFile || o instanceof HttpServletRequest || o instanceof HttpServletResponse
				|| o instanceof BindingResult;
	}

}
